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Chapter 1 Key Terms

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Across
  1. 2. an organism with cells that have nuclei and membrane-bound organelles
  2. 4. a set of populations inhabiting a particular area
  3. 7. a collection of all ecosystems on Earth
  4. 10. tree, a diagram showing the evolutionary relationships among biological species based on similarities and differences in genetic or physical traits or both
  5. 12. a large molecule typically formed by the joining of smaller molecules
  6. 13. theory, a thoroughly tested and confirmed explanation for observations or phenomena
  7. 20. a part of an experiment that can vary or change
  8. 21. knowledge that covers general truths or the operation of general laws especially when acquired and tested by the scientific method
  9. 22. all individuals within a species living within a specific area
  10. 24. science, a form of science that aims to observe explore and find things out
  11. 27. the ability of an organism to maintain constant internal conditions
  12. 31. a part of an experiment that does not change during the experiment
  13. 33. an individual living entity
  14. 34. a structure formed of tissues operating together to perform a common function
  15. 35. science, a field of science such as biology that studies living things
  16. 36. the smallest fundamental unit of structure and function in living things
Down
  1. 1. reasoning, a form of logical thinking that uses a general statement to forecast specific results
  2. 3. science, a form of science that solves real-world problems
  3. 5. a membrane-bound compartment or sac within a cell
  4. 6. a suggested explanation for an event, which can be tested
  5. 8. science, a form of science that begins with a specific explanation that is then tested
  6. 9. a group of similar cells carrying out the same function
  7. 11. the process of gradual change in a population that can also lead to new species arising from older species
  8. 12. a chemical structure consisting of at least two atoms held together by a chemical bond
  9. 14. law, a description often in the form of a mathematical formula for the behavior of some aspect of nature under certain specific conditions
  10. 15. method, a method of research with defined steps that include experiments and careful observation
  11. 16. article, a scientific report that is reviewed by a scientist’s colleagues before publication
  12. 17. science, a field of science that studies the physical world its phenomena and processes
  13. 18. science, science that seeks to expand knowledge regardless of the short-term application of that knowledge
  14. 19. a unicellular organism that lacks a nucleus or any other membrane-bound organelle
  15. 23. the study of living organisms and their interactions with one another and their environments
  16. 25. science, a field of science such as astronomy physics and chemistry that studies nonliving matter
  17. 26. able to be disproven by experimental results
  18. 28. a basic unit of matter that cannot be broken down by normal chemical reactions
  19. 29. system, the higher level of organization that consists of functionally related organs
  20. 30. reasoning, a form of logical thinking that uses related observations to arrive at a general conclusion
  21. 32. all living things in a particular area together with the abiotic nonliving parts of that environment